Shuttle.



G. F. THON.

SHUTTLE. 7 APPLICATION FILED SEPT- n, 1915.

hmm 001;. 24, 1916..

aff e M ammo/whet I GEORGE F. THON, 0F PHILADELPHIA, PENNSYLVANIA.

SHUTTLE.

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Application filed September 11, 1915.

To all whom it may concern:

Be it known that I, GEORGE F. THoN, a citizen of the United States, resident. of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have made a certain new and useful Invention in Shuttles; and I declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it appertains to make and use the invention, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

Figure 1 is a side view of the invention, as applied. Fig. 2 is a plan view of the tension attachment.

The object of this invention is to provide an improved tension attachment for shuttles, and particularly for loom shuttles, whereby it is designed to simplify the construction and application, to equalize the bobbin action and to temper and render steady the thread action.

The invention consists in the novel construction and combinations of parts, as here inafter set forth.

In common constructions, when an independent spring is employed to engage the pivoted tension trigger, it is required to drill a hole in the shuttle body for the spring lug and to cut a slot bearing to prevent pivotal action. The spring as usually made, of wire, also requires flattening, to suit the floor of the opening, and bending, and notching in the bent end, to engage the shank of the trigger.

My new tension attachment is shown in Fig. 1 of the accompanying drawings, which represents a shuttle body 2, having an opening 3, in which the bobbin 4 is located, on a pivotal bearing or wire 5 havin a rightangle end 6. This bearing is rea ily introduced and removed by pushing, its engagement with the shuttle body being effected by means of bearings in the shuttle wall, one of which is a transverse groove, indicated at 7 On the left side of the shuttle the floor is rabbeted, to provide for the perforate bearing 8 of the tension trigger, in the usual manner. My tension attachment is shown at 9, and consists of a torsional spring trigger-form device, having an integral sprmg arm. The right-angle pivotal end of the in- Specification of Letters Patent.

Patented Get. 241, 1916.

Serial No. 50,213.

terior trigger arm extends from the lower bar of the open transverse portion 10, and engages the bearing 8 in the usual manner. But the exterior arm 10 of the triggerforln device extends from the transverse bearing 12, which engages the bobbin thread, obliquely downward alongside the pivotal arm 14, and terminates in a bent end 15, which is convex on its under side and engages a rounded notch bearing 16 in the wood of the floor 17 of the bobbin opening. The open transverse rectangular portion 10 of this trigger-form device has, therefore, a pivotal arm, and, alongside the same, a spring arm, the whole being integral. The spring arm is tempered to div'erge downward, and operates to hold the transverse portion 12 against the bobbin thread in a steady and uniform manner. And the pressure of the bobbin against the pivotal bearing pin or wire 5 is designed to be materially equalized and steadied throughout the run of the thread. The entire attachment is usually made of spring wire and, being elastic throughout and torsionally acting, there is little or no variation in tension due to the use of the thread from the bobbin.

I claim:

1. A tension attachment for shuttles, consisting of an upwardly and transversely extending bent arm provided at its upper end with a transverse arm adapted to bear against the bobbin and at its lower end with a transverse pivotal arm, and a downwardly extending spring arm connected to said transverse arm and located adjacent to and at the same side ofthe shuttle as the lower portion of said bent arm and provided at its lower end with a convex portion adjacent to the lower end of said bent arm and adapt: ed to slidably engage the floor of the shuttle opening.

2. The combination with a shuttle having a bobbin opening, a bobbin, a transverse perforation located at a lower corner of the bobbin opening, a depression in its floor spaced apart at its ends from the side walls of the bobbin opening, a lower corner notch in its side wall and floor communicating with said transverse perforation and extending beyond the side all of the bobbin opening, and a seat in the floor of said notch, of a tension attachment consisting of an upwardly and transversely extending bent arm provided at its upper end with a transverse gaging said perforation, and a downwardly to the lower end of said bent arm and slidably engaging said seat.

In testimony whereof I afiix my signature, in presence of two witnesses.

GEORGE F. THON.

arm bearing against the bobbin and at its lower end with a transverse pivotal arm en- Witnesses:

CHARLES THOMPSON, J r., HARRY B. HUTCHINSON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

